It clearly says: "...you get an hour of my time to discuss..." This is just the human-to-human interaction portion of the plan. The test cases and reports are likely running all month. I have a similar retainer program where each client gets a day of my time per month for a pre-paid fee, in which I address specific concerns they have. That doesn't mean I only work one day per month on their systems as there are scheduled cron scripts and monitoring that run continuously. His explanation could be worded better.

Excellent take on the offering. You are correct, the tests are running automatically in the background all month.

"His explanation could be worded better." This is excellent feedback thank you.

He links to Visual Website Optimizer[1] as the A/B testing tool he will use. I haven't used VWO personally but based on their features page it's a point-and-click to change some visual details on the website. Install a javascript link and good to go. Again, haven't used the tool but doesn't seem like much work to me.

[1] http://vwo.com

Correct. VWO is a very simple tool to implement. The value in my offering is the design consultation.

That's correct. Once you factor in implementing the tests and analysis it will be around half a day to a full day's worth of effort.

And anyway, it's not out of line with what big companies charge when they rent out developers.

Yeah, if anything it's a bit under a half daily rate.